This image uses 770 photos. The city below is Chiang Mai, Thailand, and I shot this from the temple atop the nearby mountain called Doi Suthep. The air was a bit hazy. Shot during late afternoon so that the sun would be to my back. During the time it took to shoot 770 images, the sun was setting, darkening the ambient light. And so, the left side of the image had more light than the right side.